Satchel Brown vs Dark Green Brown

How close are they?

ΔE 18.9, loose: different enough that you should pick on purpose. Dark Green Brown is a little darker, more muted, cooler than Satchel Brown.

Can I use Dark Green Brown instead of Satchel Brown?

Not as a straight swap; see the closer alternatives below. Loose match (ΔE 19). Dark Green Brown is a little darker, more muted, cooler than Satchel Brown.

Can I use Satchel Brown instead of Dark Green Brown?

The same difference applies the other way round: Satchel Brown is a little lighter, more saturated, warmer.

ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.